Recombinant viral-based malaria vaccines

C - Chemistry – Metallurgy – 12 – N

Patent

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Details

C12N 15/30 (2006.01) A61K 39/015 (2006.01) C07K 14/445 (2006.01) C12N 15/861 (2006.01)

Patent

CA 2507915

The present invention relates to novel vaccines against malaria infections, based on recombinant viral vectors, such as alphaviruses, adenoviruses or vaccinia viruses. The recombinant viral-based vaccines can be applied for immunization against different Plasmodium infections, such as infections by P.falciparum or P.yoelii. Novel codon-optimized circumsporozoite (CS) genes are disclosed. Preferably, replication-defective adenoviruses are used, derived of serotypes that encounter low titers of neutralizing antibodies. The invention therefore also relates to the use of different adenoviral serotypes that are administered to elicit a strong immune response, either in single vaccination setups, or in prime-boost set-ups in which compositions based on different serotypes can be applied.

La présente invention concerne de nouveaux vaccins contre des infections palustres, basés sur des vecteurs viraux recombinants, tels que des alphavirus, des adénovirus ou des virus de la vaccine. Ces vaccins à base virale recombinante peuvent s'appliquer à une immunisation contre différentes infections au Plasmodium, telles que des infections au P.falciparum ou P.yoelii. Cette invention a aussi trait à de nouveaux gènes de circumsporozoïte optimisés par des codons. De préférence, des adénovirus défectueux au niveau de la réplication sont utilisés, ils sont dérivés de sérotypes qui rencontrent des titres faibles d'anticorps neutralisants. Ladite invention a aussi pour objet l'utilisation de différents sérotypes adénoviraux qui sont administrés pour provoquer une forte réponse immunitaire, soit dans la mise en place d'une vaccination unique ou dans des mises en place de stimulation de sensibilisation, au cours desquelles des compositions à base de sérotypes différents peuvent être appliquées.

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